docs: def sspro_results(self):
          """Parse the SSpro output file and return a dict of secondary structure compositions.
  
          Returns:
              dict: Keys are sequence IDs, values are the lists of secondary structure predictions.
                  H: helix
                  E: strand
                  C: the rest
  
          """
          return ssbio.protein.sequence.utils.fasta.load_fasta_file_as_dict_of_seqs(self.out_sspro)